Question

A body is projected from horizontal making an angle 60 Degree with initial Velocity of 40 m/s. Find the time taken by the body to make an angle of 45 Degree from Horizontal​

Answer 1

At 45

∘

,v

x

=v

y

or u

x

=u

y

−gt

∴t=

g

u

y

−u

x

=

9.8

40(sin60

∘

−sin30

∘

)

=1.5 s